/**
 * @Author liangzai
 * @Description:
 */
public class Training {
    //统计好三元组
    public int countGoodTriplets(int[] arr, int a, int b, int c) {
        int ans = 0;
        int n = arr.length;
        for(int i = 0; i < n - 2; i++){
            for(int j = i + 1; j < n - 1; j++){
                for(int k = j + 1; k < n; k++){
                    if(Math.abs(arr[i] - arr[j]) <= a &&
                            Math.abs(arr[j] - arr[k]) <= b &&
                            Math.abs(arr[i] - arr[k]) <= c){
                        ans++;
                    }
                }
            }
        }
        return ans;
    }
}
